Malicious PDF — malware analysis report

Static analysis result for SHA-256 00655b36411e7c99…

MALICIOUS

PDF

40.9 KB Created: 2021-04-27 13:13:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 184a4b62f4a836035998bb643a6f765c SHA-1: 2f83011e20cbf083876f8407fccac12506939385 SHA-256: 00655b36411e7c994c70e4b702aea0ea366963c895a9b8e9a6c5d852a607d07f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/how-to-get-free-robux-on-android-phone-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/cheat-manager-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hack-para-roblox-jailbreak-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/get-free-clothing-in-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-games-that-work.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-pants-catalog.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-dungeon-quest-free-stats-reset.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/does-roblox-allow-free-rebux-websites.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hacker-warning-roblox-id.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-hack-client-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-tokyo-ghoul-online-hack.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003fad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3FAD 26964 bytes
SHA-256: 163bddc462255d0f3c899501cfcdfe64d4753b9765be04a24f427362852bb4ec
font_01_sfnt_off00007c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7D 18896 bytes
SHA-256: b19e39936b2215db612d86b03ddc10f5b9689a1e9ea517ccc9a3d4c1d101067d

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